Document Detail

Effects of pranlukast on aspirin-induced bronchoconstriction: differences in chemical mediators between aspirin-intolerant and tolerant asthmatic patients.
MedLine Citation:
PMID:  11476469     Owner:  NLM     Status:  MEDLINE    
BACKGROUND: Aspirin inhibits cyclooxygenase activity and modifies production of the arachidonate cascade in aspirin-induced asthma. The aim of the present study was to examine the effects of leukotriene (LT) receptor antagonist on aspirin challenge on eosinophil activity and chemical mediators released into the airway of asthmatic patients. METHODS: Aspirin oral provocation test was performed in aspirin-intolerant asthmatic patients (AIA; N = 7) and aspirin-tolerant asthmatic patients (ATA; N = 7). In AIA, LT receptor antagonist (pranlukast) was administered orally 2 hours before the test, and its inhibitory effects on sputum LTC4+C4, eosinophil cationic protein (ECP), eosinophil count, urinary LTE4/creatinine (Cr), 11-dehydrothromboxane (11-dhTX) B2/Cr, serum LTC4+D4, ECP, and peripheral blood eosinophil count were compared with the findings in ATA subjects. RESULTS: In AIA, aspirin induced an immediate reaction associated with increased urinary LTE4/Cr and sputum ECP and a fall in urinary 11-dhTXB2/Cr. Pranlukast inhibited the bronchial reaction and an increase in sputum ECP after threshold dosed of ASA, but failed to change aspirin-induced LT production in sputum and urine. In ATA, aspirin challenge was only associated with a fall in urinary 11-dhTXB2. CONCLUSIONS: Our results indicated that aspirin-induced asthma is associated with overproduction of LT with a shift to the 5-lipoxygenase series of the arachidonate cascade and that leukotriene receptor antagonist are useful for AIA through inhibition of production of LT and eosinophilic inflammation in the airway.
Y Obase; T Shimoda; S Tomari; K Mitsuta; C Fukushima; T Kawano; H Matsuse; S Kohno
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Publication Detail:
Type:  Journal Article    
Journal Detail:
Title:  Annals of allergy, asthma & immunology : official publication of the American College of Allergy, Asthma, & Immunology     Volume:  87     ISSN:  1081-1206     ISO Abbreviation:  Ann. Allergy Asthma Immunol.     Publication Date:  2001 Jul 
Date Detail:
Created Date:  2001-07-30     Completed Date:  2001-10-25     Revised Date:  2004-11-17    
Medline Journal Info:
Nlm Unique ID:  9503580     Medline TA:  Ann Allergy Asthma Immunol     Country:  United States    
Other Details:
Languages:  eng     Pagination:  74-9     Citation Subset:  IM    
Second Department of Internal Medicine, Nagasaki University School of Medicine, Sakamoto, Japan.
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MeSH Terms
Aspirin / adverse effects*
Asthma / drug therapy*
Bronchial Provocation Tests
Bronchial Spasm / chemically induced
Bronchoconstriction / drug effects
Chromones / pharmacology*,  therapeutic use*
Drug Tolerance
Eosinophils / cytology
Leukocyte Count
Leukotriene Antagonists / pharmacology*,  therapeutic use*
Leukotrienes / urine
Middle Aged
Respiratory Function Tests
Sputum / cytology
Reg. No./Substance:
0/Chromones; 0/Leukotriene Antagonists; 0/Leukotrienes; 0/pranlukast; 50-78-2/Aspirin

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